Thread (12 messages) 12 messages, 4 authors, 2025-12-15

Re: [PATCH v3 2/7] media: rkvdec: Add variants support

From: Detlev Casanova <detlev.casanova@collabora.com>
Date: 2025-09-08 18:33:09
Also in: linux-devicetree, linux-media, linux-rockchip, lkml

Hi Jonas,

On 9/5/25 12:19, Jonas Karlman wrote:
From: Alex Bee <redacted>

Different versions of the Rockchip VDEC IP exists and one way they can
differ is what decoding formats are supported.

Add a variant implementation in order to support flagging different
capabilities.

Signed-off-by: Alex Bee <redacted>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
Changes in v3:
- Use a reference to rkvdec_variant
- Add num_regs field
Why are you adding this field ? I don't see it being used in a later patch.

Would that be useful for writing the right amount of registers later 
when switching to structs and memcpy ?

I haven't checked how different the register maps are between those 
different variants.
quoted hunk ↗ jump to hunk
- Collect r-b tag

Changes in v2:
- No change
---
  .../media/platform/rockchip/rkvdec/rkvdec.c   | 22 ++++++++++++++++++-
  .../media/platform/rockchip/rkvdec/rkvdec.h   | 11 ++++++++++
  2 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/rockchip/rkvdec/rkvdec.c b/drivers/media/platform/rockchip/rkvdec/rkvdec.c
index c15fc238d6af..daf6d9ab2d1d 100644
--- a/drivers/media/platform/rockchip/rkvdec/rkvdec.c
+++ b/drivers/media/platform/rockchip/rkvdec/rkvdec.c
@@ -14,6 +14,7 @@
  #include <linux/iommu.h>
  #include <linux/module.h>
  #include <linux/of.h>
+#include <linux/of_device.h>
  #include <linux/platform_device.h>
  #include <linux/pm.h>
  #include <linux/pm_runtime.h>
@@ -327,6 +328,7 @@ static const struct rkvdec_coded_fmt_desc rkvdec_coded_fmts[] = {
  		.ops = &rkvdec_hevc_fmt_ops,
  		.num_decoded_fmts = ARRAY_SIZE(rkvdec_hevc_decoded_fmts),
  		.decoded_fmts = rkvdec_hevc_decoded_fmts,
+		.capability = RKVDEC_CAPABILITY_HEVC,
  	},
  	{
  		.fourcc = V4L2_PIX_FMT_H264_SLICE,
@@ -343,6 +345,7 @@ static const struct rkvdec_coded_fmt_desc rkvdec_coded_fmts[] = {
  		.num_decoded_fmts = ARRAY_SIZE(rkvdec_h264_decoded_fmts),
  		.decoded_fmts = rkvdec_h264_decoded_fmts,
  		.subsystem_flags = VB2_V4L2_FL_SUPPORTS_M2M_HOLD_CAPTURE_BUF,
+		.capability = RKVDEC_CAPABILITY_H264,
  	},
  	{
  		.fourcc = V4L2_PIX_FMT_VP9_FRAME,
@@ -358,6 +361,7 @@ static const struct rkvdec_coded_fmt_desc rkvdec_coded_fmts[] = {
  		.ops = &rkvdec_vp9_fmt_ops,
  		.num_decoded_fmts = ARRAY_SIZE(rkvdec_vp9_decoded_fmts),
  		.decoded_fmts = rkvdec_vp9_decoded_fmts,
+		.capability = RKVDEC_CAPABILITY_VP9,
  	}
  };
  
@@ -1186,8 +1190,18 @@ static void rkvdec_watchdog_func(struct work_struct *work)
  	}
  }
  
+static const struct rkvdec_variant rk3399_rkvdec_variant = {
+	.num_regs = 78,
+	.capabilities = RKVDEC_CAPABILITY_HEVC |
+			RKVDEC_CAPABILITY_H264 |
+			RKVDEC_CAPABILITY_VP9,
+};
+
  static const struct of_device_id of_rkvdec_match[] = {
-	{ .compatible = "rockchip,rk3399-vdec" },
+	{
+		.compatible = "rockchip,rk3399-vdec",
+		.data = &rk3399_rkvdec_variant,
+	},
  	{ /* sentinel */ }
  };
  MODULE_DEVICE_TABLE(of, of_rkvdec_match);
@@ -1198,16 +1212,22 @@ static const char * const rkvdec_clk_names[] = {
  
  static int rkvdec_probe(struct platform_device *pdev)
  {
+	const struct rkvdec_variant *variant;
  	struct rkvdec_dev *rkvdec;
  	unsigned int i;
  	int ret, irq;
  
+	variant = of_device_get_match_data(&pdev->dev);
+	if (!variant)
+		return -EINVAL;
+
  	rkvdec = devm_kzalloc(&pdev->dev, sizeof(*rkvdec), GFP_KERNEL);
  	if (!rkvdec)
  		return -ENOMEM;
  
  	platform_set_drvdata(pdev, rkvdec);
  	rkvdec->dev = &pdev->dev;
+	rkvdec->variant = variant;
  	mutex_init(&rkvdec->vdev_lock);
  	INIT_DELAYED_WORK(&rkvdec->watchdog_work, rkvdec_watchdog_func);
  
diff --git a/drivers/media/platform/rockchip/rkvdec/rkvdec.h b/drivers/media/platform/rockchip/rkvdec/rkvdec.h
index 209dd79ce9bd..c47457c954e5 100644
--- a/drivers/media/platform/rockchip/rkvdec/rkvdec.h
+++ b/drivers/media/platform/rockchip/rkvdec/rkvdec.h
@@ -22,6 +22,10 @@
  #include <media/videobuf2-core.h>
  #include <media/videobuf2-dma-contig.h>
  
+#define RKVDEC_CAPABILITY_HEVC		BIT(0)
+#define RKVDEC_CAPABILITY_H264		BIT(1)
+#define RKVDEC_CAPABILITY_VP9		BIT(2)
+
  struct rkvdec_ctx;
  
  struct rkvdec_ctrl_desc {
@@ -63,6 +67,11 @@ vb2_to_rkvdec_decoded_buf(struct vb2_buffer *buf)
  			    base.vb.vb2_buf);
  }
  
+struct rkvdec_variant {
+	unsigned int num_regs;
+	unsigned int capabilities;
+};
+
  struct rkvdec_coded_fmt_ops {
  	int (*adjust_fmt)(struct rkvdec_ctx *ctx,
  			  struct v4l2_format *f);
@@ -98,6 +107,7 @@ struct rkvdec_coded_fmt_desc {
  	unsigned int num_decoded_fmts;
  	const struct rkvdec_decoded_fmt_desc *decoded_fmts;
  	u32 subsystem_flags;
+	unsigned int capability;
  };
  
  struct rkvdec_dev {
@@ -111,6 +121,7 @@ struct rkvdec_dev {
  	struct mutex vdev_lock; /* serializes ioctls */
  	struct delayed_work watchdog_work;
  	struct iommu_domain *empty_domain;
+	const struct rkvdec_variant *variant;
  };
  
  struct rkvdec_ctx {
Regards,

Detlev

Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help